<?php
/**
 * Elgg tagcloud
 * Displays a tagcloud
 *
 * @package Elgg
 * @subpackage Core
 * @author Curverider Ltd
 * @link http://elgg.org/
 *
 * @uses $vars['tagcloud'] An array of stdClass objects with two elements: 'tag' (the text of the tag) and 'total' (the number of elements with this tag)
 *
 */

if (!empty($vars['subtype'])) {
	$subtype = "&subtype=" . urlencode($vars['subtype']);
} else {
	$subtype = "";
}
if (!empty($vars['object'])) {
	$object = "&object=" . urlencode($vars['object']);
} else {
	$object = "";
}

if (empty($vars['tagcloud']) && !empty($vars['value'])) {
	$vars['tagcloud'] = $vars['value'];
}

if (!empty($vars['tagcloud']) && is_array($vars['tagcloud'])) {
	$counter = 0;
	$cloud = "";
	$max = 0;
	foreach($vars['tagcloud'] as $tag) {
		if ($tag->total > $max) {
			$max = $tag->total;
		}
	}
	foreach($vars['tagcloud'] as $tag) {
		if (!empty($cloud)) {
			$cloud .= ", ";
		}
		// protecting against division by zero warnings
		$size = round((log($tag->total) / log($max + .0001)) * 100) + 30;
		if ($size < 60) {
			$size = 60;
		}
		$cloud .= "<a href=\"" . $vars['url'] . "search/?tag=". urlencode($tag->tag) . $object . $subtype . "\" style=\"font-size: {$size}%\" title=\"".addslashes($tag->tag)." ({$tag->total})\" style=\"text-decoration:none;\">" . htmlentities($tag->tag, ENT_QUOTES, 'UTF-8') . "</a>";
	}
	echo $cloud;
}